High-Speed Extrustion of Polyethylene in the Acceleration of Projectiles in Ballistic Launchers

Resumo

Acceleration of projectiles in ballistic launchers by means of high-speed extrusion of polyethylene through a tapered adapter is experimentally and theoretically studied. Quasi-one-dimensional gas-dynamic model of a polydisperse mixture of gas and powder particles and a viscoplastic model of a deformable piston are used. The results of numerical simulation of the process under study and the results of a series of shots from a powder ballistic launcher are given. The influence of the geometry of a tapered section and input velocity of the deformable piston on the output velocity of a projectile is experimentally investigated.